Percussion fuse



April. ,17,' 1928. 1,666,792

L. E. REMONDY v I rmncuss x'on Fuss Filed July 5. 1927 V cussion fuses as the result ofimpact with a Patented Apr; 17, 1928.

N t [TED STATES nnou nmmn niuuonnv, or PARIS, FRANCE.

rnncussron ruse.

Application filed J'uly5, 1927, Serial No.

Percussion fuses operating by driving in and, more particularly, fuses operating by driving in and inertia are known, such. as those forming the subject of prior Patent No. 1,459,075. These fuses are extremely sensitive, that is to say they. are adapted to operate as a result of impact with an obstacle offering a ,very small resistance, such as the wing fabric of an aeroplane, very soft soil,- etc.

The present invention relates to a device obstacles. The device may be advantageous- 1y employed in all cases when the fuses arenot employed for firing upon aircraft.

In practice the new device will prevent the untimely operation of very sensitive perlight flexible obstacles accidentally encountered near the .muzzle of 'the'gun or' along the path of the projectile, such as 7 small branches or-other light screens, made of fabric for example, which are employed for concealing the gun, the small branches of bushes, the stems of cereal crops encountered before thefall of the projectile, etc.

This device consists essentially in a perforated obturating cap or disc integral with the fuse body or mounted upon the latter; the orifices formed in the base of the cap or in the obturating disc being of sufficient dimensions to allow the free entry-of soft V or fluid material (ooze, soft earth,'sand, water, etc.) but on the other hand making it impossible for branches, twigs or other similar obstacles which may be struck transverseiy to become engaged and have access to the percussion mechanism. The strength of the solid parts whichseparate the orifices from each other is nevertheless sufficiently small for the deformation of the end of the cap or of the obturating disc or its rupture to be obtained as the result of an impact against an olmtacle offering resistance (hard whole of the edge ofthis fuse body at 6 203,612, and in France 0ctober'8, 192 6.

soil, stones, gravel branches, etc.) Various; examples of construction of the invention are illustrated in the accompanying drawing.

Figures-1 and 2 show a first example in sectional elevation and in plan respectively.

The device, in this example, is assumedto be employed with a very sensitive percussion fuse operating by driving iii and inertia, and comprisin a casing A containing the ring mechanism (striker B integral or virtually integral with the casing, independent percussion .cap C normally separated from the striker by a spacing spring D).

The protecting deviceds in this example stormed bya' perforated cap formed by an element E of the fuse body EF. The extreme front part E of the. fuse body isintrunks of trees or main tegral with asuitably perforated 'clisc' G.

Theorifices g bounded by the arms'or solid parts-g are of dimensions such that they 1 allow soft. materials. or fluids (soft earth, ooze, sand, water, etc.) to penetrate'freely in order tohave access to the movable carriage AB;C. I

On the other hand the disc, which is preferably slightly convex will ward olf any light branch or other similar flexible obstacle, the stems of cereal crops, canvas screens, etc. which it may encounter during its travel, whethernear the muzzle of the gun or while it is describing its "trajectory.

On the'other hand the strength of the said disc or cap end and particularly of thef'arms g will'be sufliciently small so that upon contact with a solid obstacle ofiering suficient resistance, deformation or rupture will-follow, theefiect' of-which will be to cause the movable carriage to be driven into the projectile and the fuse to operate as a consequence. a

The. projecting device may, as shown in sectional elevation in Figure 3, be formed by a simple disc Gg the outer'end of which is carried upon a shoulder e of the-fuse body and is retained by turning down the outer The protecting device'may be constructed so as to be removable so that it may, as desired, be placed into position upon the projectile or removed therefrom according to the use to which the projectiles are to be put.

of a bayonet joint or any other suitable securing or attachment means.

For storing and preservation the orifices g may be closed by means of a thin light disc, of paper or fabric of extremely small strength which may remain attached to'the cap during firing.

A happens to be fired from a gun from which It is to be noted that the perforated protecting cap will prevent the accidental operationrof the fuse of a projectile which the muzzle coverof leather or strong canvas has not been removed. I

A protecting device preventing the acci dental operation of sensitive' percussion fuses operating by driving it or by driving in and resistance.

inertia upon impact with obstacles accidentally encountered near the muzzle of the gun or along the path of the projectile, such as branches or other screens serving to conceal the gun, the stems of cereal crops, the branches of shrubs, etc. consisting in a perforated cap or closing disc (G) integral with the fuse body or mounted upon the latter, the orifices (g) formed in this cap permitting the free penetration of soft or fluid materials (ooze, soft earth, sand, water, etc.) while preventing the engagement of light or flexible branches and twigs which are struck transversely, the strength of the solid parts (9) between the orifices (g) of the cap bein on'the other hand sufliciently weak for t e deformation or rupture of the end of the cap 01' of the closing disc to be effected upon impace with an nbstacle offering some In testimony whereof specification.

LEON EMILE REMONDY.

I have signed this 

